CN115823341B - Electronic expansion valve stop device - Google Patents
Electronic expansion valve stop device Download PDFInfo
- Publication number
- CN115823341B CN115823341B CN202211526003.XA CN202211526003A CN115823341B CN 115823341 B CN115823341 B CN 115823341B CN 202211526003 A CN202211526003 A CN 202211526003A CN 115823341 B CN115823341 B CN 115823341B
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- China
- Prior art keywords
- guide rail
- spring guide
- circumferential
- diameter section
- expansion valve
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- 239000002184 metal Substances 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Transmission Devices (AREA)
Abstract
The invention provides an electronic expansion valve stop device which comprises a nut, a spring guide rail and a slip ring, wherein the spring guide rail and the slip ring are nested inside and outside and are in spiral fit, an upper stop part is arranged at the top end of the spring guide rail, a lower stop part is arranged at the lower end of the spring guide rail, the nut comprises a small-diameter section sleeved by the spring guide rail and a large-diameter section extending out in the radial direction, the lower stop part comprises a circumferential limit part extending in the axial direction, and the tail end of the circumferential limit part extends at least three-fourths circles around the small diameter Duan Zhouxiang to form a surrounding part. Therefore, the circumferential limiting part is matched with the small-diameter section by abutting the spring guide rail on the circumferential limiting part, the deformation is limited when the sliding ring abuts against the circumferential limiting part, the rotor rotation zero point is accurately limited, and the sliding ring is prevented from being blocked by the circumferential limiting part.
Description
Technical Field
The invention relates to the field of refrigeration air conditioners, in particular to an electronic expansion valve stop device.
Background
The refrigeration system includes a compressor, an evaporator, a condenser, and a throttling element, typically employing an electronic expansion valve as the throttling element, the electronic expansion valve being used to throttle the refrigerant of the refrigeration system. The existing electronic expansion valve stopping device of the Chinese patent application 201010515238.X comprises a spring guide rail and a slip ring which are nested inside and outside and are in spiral fit, wherein the spring guide rail is provided with an upper stopping part and a lower stopping part, and further comprises a nut matched with a screw rod of an electric valve; the nut is provided with a radially extending step surface, and a clamping limiting surface is arranged on the nut below the step surface and is fixedly connected with the valve seat of the electric valve; the spring guide rail is sleeved on the nut above the step surface, the lower stop part of the spring guide rail radially extends to form a positioning part propped against the step surface, and the lower stop part below the positioning part is clamped and positioned with the upper clamping limiting surface of the nut. The clamping limiting surface is specifically a circumferential limiting surface axially arranged on the nut and an axial limiting surface connected with the circumferential limiting surface; the lower stop part below the positioning part is specifically a circumferential limiting part which is formed by axial extension and abuts against the circumferential limiting surface, and an axial limiting part which is formed by circumferential extension and abuts against the axial limiting surface. In the scheme, the lower stop part radially extends to form a positioning part propped against the step surface, the positioning part and the step surface can be guaranteed to prop against each other only by combining with the clamping and limiting surface on the nut for clamping and positioning, otherwise, the distance between the circumferential limiting part and the clamping and positioning part is too large, when the sliding ring props against the circumferential limiting part, the stress deformation amount is large when the sliding ring props against the circumferential limiting part, the sliding ring possibly slides through the inner side of the circumferential limiting part, and finally the sliding ring is blocked and cannot return.
Disclosure of Invention
The invention aims to provide an electronic expansion valve stop device which reduces movement noise when a slip ring abuts against a lower stop part.
In order to solve the technical problem, as one aspect of the invention, there is provided an electronic expansion valve stop device, which comprises a nut, and a spring guide rail and a slip ring which are nested inside and outside and are in spiral fit, wherein the top end of the spring guide rail is provided with an upper stop part, the lower end of the spring guide rail is provided with a lower stop part, the nut comprises a small diameter section and a large diameter section which radially extends out, the nut comprises an axially extending circumferential limit part, and the tail end of the circumferential limit part extends at least three-fourths circles around the small diameter Duan Zhouxiang to form a surrounding part.
Further, the surrounding portion is formed by extending the tail end of the circumferential limiting portion at least one circle around the small-diameter section along the reverse circumferential direction of the spiral direction of the spring guide rail.
Further, the surrounding portion extends at least one turn to press against the circumferential limit portion.
Further, the nut is made of plastic, an annular metal connecting sheet which is fixedly connected with the valve seat of the electric valve is embedded and fixed on the outer peripheral surface of the nut below the step surface, the nut and the annular metal connecting sheet are integrally formed by injection molding, a notch is formed in the outer edge of the annular metal connecting sheet, a V-shaped bending opening is formed in the rear of the surrounding part of the lower stop part of the spring guide rail, and the V-shaped bending opening and the notch are clamped to limit the circumferential and axial positions.
Further, the upper stop includes an axially extending circumferential limit and an upper surround, the upper limit end extending at least three-quarters of a turn around the minor diameter Duan Zhouxiang to form an upper surround.
Further, the upper surrounding portion is tightly fitted with the nut small diameter section.
Further, the end ring at the top end of the spring guide rail is tightly matched with the small-diameter section of the nut.
Further, the upper stop part further comprises an inwards bent tail part, a concave part is arranged at a position corresponding to the tail part of the spring guide rail in the small-diameter section, and the tail part of the spring guide rail is assembled in the concave part.
Further, the upper surrounding portion extends at least one turn to press the circumferential limit portion.
The invention discloses an electronic expansion valve stop device, which comprises a nut, a spring guide rail and a slip ring, wherein the spring guide rail and the slip ring are nested inside and outside and are in spiral fit, the top end of the spring guide rail is provided with an upper stop part, the lower end of the spring guide rail is provided with a lower stop part, the nut comprises a small-diameter section sleeved by the spring guide rail and a large-diameter section extending radially, the lower stop part comprises a circumferential limit part extending axially, and the tail end of the circumferential limit part extends at least three-fourths circles around the small diameter Duan Zhouxiang to form a surrounding part. Therefore, the circumferential limiting part is matched with the small-diameter section by abutting the spring guide rail on the circumferential limiting part, the deformation is limited when the sliding ring abuts against the circumferential limiting part, the rotor rotation zero point is accurately limited, and the sliding ring is prevented from being blocked by the circumferential limiting part.
Drawings
FIG. 1 is a schematic diagram showing a front view of an electronic expansion valve stopper according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing a right-hand construction of an electronic expansion valve stopper according to an embodiment of the present invention;
FIG. 3 shows a schematic perspective view of a spring rail in accordance with an embodiment of the present invention;
FIG. 4 shows a schematic diagram of the front structure of a spring rail according to an embodiment of the present invention;
fig. 5 shows a schematic diagram of a left-hand structure of a spring rail according to an embodiment of the invention.
Reference numerals in the drawings: nut 1, large diameter section 2, small diameter section 3, spring rail 4, spring rail top end last circle 41, upper stop 5, circumference upper limit 51, upper surrounding portion 52, spring rail top end 53, slip ring 6, connecting piece 7, notch 71, lower stop 8, circumference limit 81, surrounding portion 82, V-shaped bending port 83.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples. It is to be understood that the terms "upper," "lower," "left," "right," "longitudinal," "transverse," "inner," "outer," "vertical," "horizontal," "top," "bottom," and the like, as used herein, are merely based on the orientation or positional relationship shown in the drawings and are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the devices/elements referred to must have or be configured and operated in a particular orientation and therefore should not be construed as limiting the invention.
According to an embodiment of the present invention, referring to fig. 1 to 5, an electronic expansion valve stopping device according to an embodiment of the present invention includes a nut 1, a large diameter section 2, a small diameter section 3, a spring rail 4, an upper stopping portion 5, a slip ring 6, a connecting piece 7, and a lower stopping portion 8.
The nut 1 comprises a large-diameter section 2 and a small-diameter section 3 above the large-diameter section 2, a spring guide rail is nested outside the small-diameter section of the nut, an upper stop part 5 is arranged at the top end of the spring guide rail, and a lower stop part 8 is arranged at the lower end of the spiral guide rail 4; the large-diameter section 2 is provided with a connecting sheet 7, and the connecting sheet 7 is connected with the nut large-diameter section 2 and is used for fixing the nut 1. The sliding ring 6 is matched with the spring guide rail 4, when the coil of the electronic expansion valve drives the magnetic rotor to rotate, the sliding ring 6 is pushed to slide up and down along the spring guide rail 4, when the sliding ring 6 moves to a top dead center, the upper stop part 5 limits the sliding ring 6, and when the sliding ring 6 moves to a bottom dead center, the lower stop part 8 limits the sliding ring 6. The lower stop includes an axially extending circumferential stop 81, the end of which extends at least three-quarters of a turn around the minor diameter Duan Zhouxiang to form a surround 82. More preferably, the surrounding part is formed by extending at least one circle around the tail end of the circumferential limit part 81 along the reverse circumferential direction of the spiral direction of the spring guide rail, and the surrounding part extends at least one circle to press the circumferential limit part 81 (not shown). Wherein, one or three-quarter turns are started from the circumferential limit part 81.
The circumference spacing portion relies on the spring guide to abut on circumference spacing portion a ring and encircle the portion 82 cooperation minor diameter section, when the sliding ring 6 removes to the bottom dead center, circumference spacing portion 81 is spacing to sliding ring 6, circumference spacing portion 81 pastes tight minor diameter section, the deflection has been limited, the accurate rotor rotation zero point that limits, compare background file, spring guide circumference spacing portion 81 all abuts annular position from top to bottom, annular position has all pasted the minor diameter section when circumference spacing portion 81 receives sliding ring tangential compressive force, prevent that the sliding ring from drawing circumference spacing portion and blocking. The surrounding part 82 extends at least one circle to press the circumferential limiting part 81, so that the circumferential limiting part 81 can be attached to the small-diameter section, and loosening of the circumferential limiting part 81 can be prevented. In general use, the connecting sheet 7 is a metal sheet, the nut is made of plastic, the annular metal connecting sheet which is fixedly connected with the valve seat of the electric valve is embedded and fixed on the outer peripheral surface of the nut below the step surface, the nut 1 and the annular metal connecting sheet are integrally injection molded, a notch 71 is arranged on the outer edge of the annular metal connecting sheet, a V-shaped bending opening 83 is arranged behind the surrounding part 82 of the lower stop part of the spring guide rail, and the V-shaped bending opening and the notch are clamped to limit the circumferential and axial positions.
In this embodiment, the upper stop portion 5 includes an axially extending circumferential limit portion 51 and an upper surrounding portion 52, where the end of the circumferential limit portion extends around the minor diameter section 3 for at least three quarters of a circle to form the upper surrounding portion 52, the upper surrounding portion 52 is tightly matched with the minor diameter section 3 of the nut, so as to increase stability of the spring guide rail, the end ring 41 at the top end of the spring guide rail is tightly matched with the minor diameter section 3 of the nut, two ends of the circumferential limit portion are adjacent to annular portions, and the annular portions are tightly attached to the minor diameter section no matter whether the circumferential limit portion is stressed or not, so that noise of the slip ring 6 caused by rebound of the spring guide rail is prevented. The small diameter section 3 is provided with a recess (radially recessed, not shown) at the top end of the spring rail 4 corresponding to the position, the top end 53 of the spring rail is bent inwards, when the spring rail is assembled, the top end 53 is aligned with the recess, and the top end 53 of the spring rail is snapped into the recess, thereby limiting the axial and circumferential positions of the spring rail and increasing the stability of the spring rail. In addition, the upper surrounding part extends at least one circle to press the circumferential limit part (not shown), so that the performance is better.
And assembling a stop device, namely enabling the sliding ring to coincide with the axis of the spring guide rail along the spiral direction of the spring guide rail, placing the sliding ring on a first spiral body of the spring guide rail, sleeving the sliding ring and the first spiral body on a small-diameter part of the nut together, clamping a V-shaped bending opening and a notch of a lower stop part of the spring guide rail to limit the circumferential and axial positions, and inserting the tail end of the top end of the spring guide rail into the concave part.
The above is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but various changes can be made by those skilled in the art. Any modifications, equivalent substitutions, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The electronic expansion valve stop device comprises a nut, a spring guide rail and a slip ring, wherein the spring guide rail and the slip ring are nested inside and outside and are in spiral fit, an upper stop part is arranged at the top end of the spring guide rail, a lower stop part is arranged at the lower end of the spring guide rail, and the nut comprises a small-diameter section sleeved by the spring guide rail and a large-diameter section extending radially, and is characterized in that: the lower stop includes an axially extending circumferential stop end extending at least three-quarters of a turn around the minor diameter Duan Zhouxiang to form a surround; the upper stop includes an axially extending circumferential limit and an upper surround, the upper limit end extending at least three-quarters of a turn around the minor diameter Duan Zhouxiang to form an upper surround, the upper surround being a tight fit with the nut minor diameter section.
2. The electronic expansion valve stopping device of claim 1, wherein: the surrounding part is formed by extending at least one circle of the tail end of the circumferential limiting part around the small-diameter section along the reverse circumferential direction of the spiral direction of the spring guide rail.
3. The electronic expansion valve stopping device of claim 1, wherein: the surrounding part extends at least one circle to press the circumferential limiting part.
4. The electronic expansion valve stopping device of claim 1, wherein: and the end ring at the top end of the spring guide rail is tightly matched with the small-diameter section of the nut.
5. The electronic expansion valve stopping device of claim 1, wherein: the upper stop part further comprises an inwards bent tail part, a concave part is arranged at the position, corresponding to the tail part of the spring guide rail, of the small-diameter section, and the tail part of the spring guide rail is assembled in the concave part.
6. The electronic expansion valve stopping device of claim 1, wherein: the upper surrounding part extends at least one circle to press the circumferential limit part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211526003.XA CN115823341B (en) | 2022-11-30 | 2022-11-30 | Electronic expansion valve stop device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211526003.XA CN115823341B (en) | 2022-11-30 | 2022-11-30 | Electronic expansion valve stop device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115823341A CN115823341A (en) | 2023-03-21 |
| CN115823341B true CN115823341B (en) | 2023-07-07 |
Family
ID=85533379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211526003.XA Active CN115823341B (en) | 2022-11-30 | 2022-11-30 | Electronic expansion valve stop device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115823341B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454818A (en) * | 2010-10-15 | 2012-05-16 | 浙江三花股份有限公司 | Electric valve |
| CN209706390U (en) * | 2018-12-11 | 2019-11-29 | 浙江恒森实业集团有限公司 | A kind of rotor optimizing electric expansion valve stop executing agency |
| CN210014030U (en) * | 2019-06-17 | 2020-02-04 | 浙江恒森实业集团有限公司 | Combined structure of electronic expansion valve slide rail and magnetic ring rotor shaft |
| CN212643581U (en) * | 2020-07-01 | 2021-03-02 | 浙江恒森实业集团有限公司 | Combined structure of electronic expansion valve rotor spring guide rail |
| CN214197319U (en) * | 2020-12-14 | 2021-09-14 | 广东威灵电机制造有限公司 | Nut, electronic expansion valve and stop structure and refrigeration equipment thereof |
| CN217898804U (en) * | 2022-04-14 | 2022-11-25 | 海力达汽车科技有限公司 | Electronic expansion valve |
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2022
- 2022-11-30 CN CN202211526003.XA patent/CN115823341B/en active Active
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| Publication number | Publication date |
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| CN115823341A (en) | 2023-03-21 |
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